Partially convert geolocation IPC to Mojo.

content/public/common/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//content/common/common.gni")
+import("//mojo/public/tools/bindings/mojom.gni")
 
 # See //content/BUILD.gn for how this works.
 group("common") {
   if (is_component_build) {
     public_deps = [ "//content" ]
   } else {
     public_deps = [ ":common_sources" ]
   }
 }
 
@@ skipping 19 matching lines @@
     "//ui/gfx",
   ]
 
   if (!enable_plugins) {
     sources -= [
       "pepper_plugin_info.cc",
       "pepper_plugin_info.h",
     ]
   }
 }
+
+mojom("mojo_bindings") {
+  sources = [
+    "mojo_geoposition.mojom",
+  ]
+}